Method of making containers for cakes, etc.



July 3, 1928.

G. W. GWINN llETfiOD OF MAKING CONTAINERS FOR CAKES, ETC

Filed May 1927 W vsmpn ATTORNEY Patented July 3, 1928 unrrr: srrE-sIRA-TENT OFFICE.

GEORGE WILIBUR GWINN, or HEWLETT, NEW-,YORK, ASSIGNOR iro AMERiCANMACHINE & FOUNDRY COMPANY, A CORPORATION or NEW JERSEY.

mnrnon OFJIIAKING mea times; FOR cams, are.

' 7 A plicant filed ma This invention relates tofan im roved method ofmaking containers for ca es or similar soft food products, its mainobject being to provide a hermetically sealed con- 5 tainer for softarticles which cannot be handled or subjected to pressure while beingwrapped. Such containers heretofore"have been made with aninsertedilange "towhich the .cover is sealed, andiwith a body having aseries of overlaps or lpl'eats morefor less haphazard in arrangement.The present improvement controls the n ul'nber andshape ofsuchpleats, sothat tlie paclmge can be made geometrically s'ynnnetrical'and uniformand will present a better appearance.

This is accomplishedby providing the shaping dies with slots in asuitable arrangement to guide the wrapper when being formed into shapeto rec'eivethecake. [By varying the arrangement of slots and"th e'lrindof relative n'iotion'between the top and bottom dies, any number andshape of overlaps or pleats within the limits of the container may beformed. Thus,'by using a slotted bottom die, a vertically sliding topdie,'and a system of hinged pressure'fingersf surrounding both dies whenforced together,

a box-pleated container of the desired shape and with the desirednumber'of'pleats can 50 be produced. Or, by using dies of special shape,the lower portion of the side walls of the container may be made incorrugated form, while the top portions are box-pleated. In square,rectangular or polygonal containers, the pleats are of course placed atthe corners. For circular. oval or heartshaped and other curved forms,the number, shape and disposition of the pleats is arranged to best suitthe general appearance of the container.

The cover may be laid on and sealed after the flange is made, or it maybe attached to the flange during formation of the latter. In the lattercase, the article to be wrapped must of course be inserted in thecontainer directly after forming its body portion; but the cover, beingsealed by the same formation that produces the flange, can then also bemade with box-pleats corresponding to those of the container.

The side walls of the container may be made sloping, so that a number ofcontainers may be nested together if desired.

In the accompanying drawings, in which like characters of referenceindicate the same 19 2?." Serial No.. 1:88,087.

or like parts, Figs. 1 and 1" to 4 and 4 illustratessuccessive stages inproducing a box-pleated containerwith asealing flange;

5fand' "5" illustratea rectangular container with box-pleats at thecorners; Fig. 6 shows thesame container after its'flangehasbeeeninverted; Fig. 7 shows a circular or oval container withbox-pleats; Fig. 8 shows a 'box-pleated'j circular or 'oval containerwithits flange inverted and its cover sealed; and Fig.':9"shows acircularor oval 'container'with the cover in process of being sealed,the'lower' portion of the side walls in this case being corrugated,While the upper portion is box-pleated.

Referring to Fig. 1, which is a top view, and Fig. 1 which is asectional sideelevation, 10. indicates a sheetof wrapping ma.-

terinl'of the propershape whichis to be made into a container. It isplaced upon thebottom die 1 1, provided with slots 12, and is'thenforced downwardly by the top die 13. As the die 13 sinks into the 'die11, or either, in this or reversed position, is inoved towards theother, thereby forming the cup-like depression by folding up the edgesof the wrapper, the surplus material emerges from the slots 12 and formsthe ,loops' 'l lshown 'in Figs. 2' and 2. When the top die has beencompletely compressed,

' the hinged Fingers 15 are closed-around the bottom die, therebyflattening out theloops and forming the box-pleats 16, as shown in Figs.3 and 3 The top edge of the container thus formed is then turnedoutwardly as by the cover die 17, shown in Figs. 4 and 4*, therebyforming the sealing flange 18.

After the article has placed in the container, and while the latter isstill held in the bottom die 11, a cover sheet of the proper shape ispressed on to the flange 18', as by a suitable die, either before orafter the flange has been inverted or turned down parallel with thesides of the container. When the cover is applied to the sealing flange,while the latter is in the horizontal position shown in Figs. 4 and 4,the cover and flange are simultaneously turned downwardly, and theflange turning die may be so arranged that the cover is box-pleatedaround the box pleats of the flange, thereby producing an interlockedseal which is held in place by applying paste to one of the joinedsurfaces; or, in case of waxed paper, by subsequent heating of thejoint.

In Figs. 5 and. 5" are shown respectively the top view and sideelevation of -a rectangular container 19, produced by the method shownin Figs. 1 and I to 4- and 4:, the boxpleats 16 in this case beinglocated at the corners and folded equally over the two adjoining sidesof the box. When inverting the flange 18, the pleats are neatly foldedunder, giving to the box the form shown in Fig- 6.

Fig. 7 shows a circular or oval container made by the improved method,the box plea-ts 16 being symmetrically arranged around the curvedsurface. In Fig. 8, the same container 20 is shown sealed by a cover 2the box pleats of the latter interlocking with those of the former.

In Fig. 9, a. container 22 with a cover 23 is shown, the dies forforming the same being made of such form as to produce the corrugations24: along a portion of its height, and the box-pleats 25 along theremainder. The cover 23, which is shown partly inverted, has thecorrugations 26 arranged to match the box-pleats 25 and covering thelatter when completely turned down and folded on the flange 18 of thecontainer 22. The container 22 is made with slightly sloping side wallssuitable for nesting.

According to the shape of the dies and to the number and arrangement ofthe slots, containers of many shapes and with many arrangements ofbox-pleats-with or without corrugationsn'iay be produced by this method.

What is claimed is:

1. The method of making a package, which consists in folding a sheet ofpaper to form a container bottom having an upstanding wall provided witha series of out-standing loops. then forming said loops into boxpleatson said wall, then folding the upper part of said wall outwardly to forma flange, then filling the container so formed, then attaching a. coverto said flange, and then folding said cover and flange down together onsaid wall.

2. The series of steps in a method of making a package, which consistsin folding a. sheet of paper to form a container bottom having anupstanding wall provided with a series of outstanding loops, thenforming said loops into box-pleats on said wall, then folding the upperpart of said wall outwardly to form a flange, then filling the containerso formed and then attaching a cover to said flange.

3. The series of steps in a method of making a container, which consistsin folding a sheet of paper to form a container bottom having anupstanding wall provided with a series of outstanding loops, thenforming said loops into box-pleats on said wall, and then folding theupper partof said wall outwardly to form a flange.

4. The series of steps in a method of making a container, which consistsin folding a sheet of paper to form a container bottom having anupstanding wall provided with a series of outstanding loops, and thenforming said loops into box-pleats on, said wall.

5. The method of making a container, which consists in folding a sheetof paper to form a container bottom having an upstand' ing wall providedwith a series of outstanding loops, then forming said loops intoboxpleats on said wall, and then doubling the upper part of said wallback on itself.

In testimony whereof, I have signed my name to this specification.

GEORGE VILBUR GYVINN.

